vasilito
b9874d0941
Add redbear-usb-storage-check in-guest binary that validates USB mass storage read and write I/O: discovers /scheme/disk/ devices, writes a test pattern to sector 2048, reads it back, verifies match, restores original content. Updates test-usb-storage-qemu.sh with write-proof verification step. Includes all accumulated Red Bear OS work: kernel patches, relibc patches, driver infrastructure, DRM/GPU, KDE recipes, firmware, validation tooling, build system hardening, and documentation.
95 lines
1.9 KiB
C
95 lines
1.9 KiB
C
#include <assert.h>
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#include <pthread.h>
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#include <stdatomic.h>
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#include <stdbool.h>
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#include <stdio.h>
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#include <signal.h>
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#include <errno.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include "signals_list.h"
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#include "../test_helpers.h"
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// This program verifies that sigpause() suspends the calling process
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// until it receives a signal.
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#define INMAIN 0
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#define INTHREAD 1
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volatile sig_atomic_t handler_called = 0;
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volatile atomic_bool completed = false;
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void handler() {
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handler_called = 1;
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return;
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}
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void *b_thread_func(void *code_raw) {
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int *code = code_raw;
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printf("Pausing signal %s\n", strsignal(*code));
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sigpause(*code);
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assert(handler_called != 0);
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*code = 0;
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atomic_store(&completed, true);
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return NULL;
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}
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int sigpause_suspend(int signum)
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{
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atomic_store(&completed, false);
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int status;
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struct sigaction act;
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act.sa_flags = 0;
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act.sa_handler = handler;
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sigemptyset(&act.sa_mask);
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status = sigaction(signum, &act, 0);
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ERROR_IF(sigaction, status, == -1);
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pthread_t new_th;
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int code = signum;
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if ((status = pthread_create(&new_th, NULL, b_thread_func, (void *)&code)) != 0) {
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errno = status;
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perror("failed to create thread");
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return EXIT_FAILURE;
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}
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usleep(100000);
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assert(!atomic_load(&completed));
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if ((status = pthread_kill(new_th, signum)) != 0) {
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errno = status;
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perror("failed to kill thread");
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return EXIT_FAILURE;
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}
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if ((status = pthread_join(new_th, NULL)) != 0) {
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errno = status;
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perror("failed to join thread");
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return EXIT_FAILURE;
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}
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assert(code == 0);
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assert(atomic_load(&completed));
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return EXIT_SUCCESS;
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}
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int main(){
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// TODO: upper limit for i (gives OOB otherwise)
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for (int i=1; i<31; i++){
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int sig = signals_list[i].signal;
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if (sig == SIGKILL || sig == SIGSTOP){
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continue;
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}
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printf("For signal %s (%d)\n", strsignal(sig), sig);
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sigpause_suspend(sig);
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}
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return EXIT_SUCCESS;
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}
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